215415199972 has 24 divisors (see below), whose sum is σ = 433473540416. Its totient is φ = 91754412768.

The previous prime is 215415199963. The next prime is 215415199973. The reversal of 215415199972 is 279991514512.

It is not an unprimeable number, because it can be changed into a prime (215415199973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23594823 + ... + 23603950.

Almost surely, 2^215415199972 is an apocalyptic number.

It is an amenable number.

215415199972 is an abundant number, since it is smaller than the sum of its proper divisors (218058340444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215415199972 is a wasteful number, since it uses less digits than its factorization.

215415199972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47198947 (or 47198945 counting only the distinct ones).

The product of its digits is 2041200, while the sum is 55.

The spelling of 215415199972 in words is "two hundred fifteen billion, four hundred fifteen million, one hundred ninety-nine thousand, nine hundred seventy-two".